Sodium Dithionite, Sodium Hydrosulfite, Hydro Blue 92, 7775-14-6

Water Conditioning, Pool

Agriculture, Food, Pharmaceutical

Plastic, Rubber, Polymer

Detergent, Cosmetic

Construction, Mining, Metal

Textile, Leather, Paper

Sectoral Paint, Dye Colorant

Industrial Textiles and Coatings

Vowen, Knitted Fabric

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Sodium Dithionite, Sodium Hydrosulfite, Hydro Blue 92, 7775-14-6

General Chemical Information

Density: 2.4 g/cm³
Melting Point: 52 °C
Solubility:
- Highly soluble in water (24.1 g in 100 g water at 20 °C)
- Slightly soluble in alcohol
- Insoluble in acids
Stability: Not stable; reacts with air and moisture, generating heat that may ignite nearby combustible materials.
Reactivity: Strong reducing agent; donates electrons and reduces other compounds.
Storage Precautions:
- Prevent dust and aerosol formation
- Ensure proper ventilation
- Keep away from flammable materials

Paper Industry:
- Bleaching and decolorizing recycled paper fibers
- Brightening kaolin clay
Textile Industry:
- Reduction of indigo and vat dyes
- Formation of leuco compounds (water-soluble forms with high affinity for fibers)
- Used as a color-reducing agent to lighten fabrics
- Control of iron flash in white fabrics
Water and Gas Treatment:
- Applied in bleaching environments in water treatment systems
- Used in gas purification processes
Other Uses:
- Reduction of hexavalent chromium (Cr(VI)) in cement
- Carpet cleaning (enhancing brightness and correcting colors)
- Processing of polymers, clays, leather, food, and beverages
- As a cleaning and chemical processing agent

Typically available in 85–90% purity.
International synonyms include: Sodium Dithionite, Disodium Hydrosulfite, Natrium Dithionit, Vatrolite, Sodium Hyposulfite.

Sector / Application Area	Suitability	Typical Usage Level / Notes
Paper Industry	Highly suitable	Used for bleaching recycled paper pulp and brightening kaolin clay. Dosage varies with pulp brightness target (commonly 0.2–1.0% on dry pulp weight).
Textile Industry	Primary application	Reduction of indigo and vat dyes. Typical usage 1–3% on fiber weight, often combined with hydrogen peroxide or sodium hypochlorite for complete bleaching.
Water Treatment	Suitable	Applied in bleaching environments and for iron flash control in white fabrics. Dosage depends on water chemistry; generally low ppm levels.
Gas Treatment	Suitable	Used in purification processes as a reducing agent. Dosage depends on gas composition and flow rate.
Cement Industry	Selective use	Reduces hexavalent chromium (Cr(VI)) to Cr(III). Typical addition 0.1–0.3% of cement weight.
Carpet Cleaning	Niche use	Provides brightness and color correction. Applied in dilute solutions; concentration adjusted to carpet fiber type.
Polymers / Chemical Processing	Suitable	Acts as reducing agent in polymerization and chemical synthesis. Dosage varies by process design.
Leather Industry	Moderate suitability	Used in bleaching and processing steps. Dosage depends on leather type and desired finish.
Food & Beverage Processing	Limited / controlled	Historically used in some processes, but modern regulations restrict direct food contact. Usage only under compliance with local regulations.

Sodium Dithionite
Sodium Hydrosulfite
Disodium Hydrosulfite
Disodium Dithionite
Sodium Sulfoxylate
Sodium Hyposulfite
Vatrolite
Natrium Dithionit (Almanca kökenli, İngilizce literatürde de geçer)
Dithionito de sodio (İspanyolca kökenli, uluslararası ticarette karşılaşılabilir)